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org.globus.ftp
Class Buffer

java.lang.Object
  org.globus.ftp.Buffer

public class Buffer
extends Object

Represents a chunk of data cut out of a larger data volume. Buffer is characterized by offset at which it belongs to the larger data volume, and length. The internal data array always starts at 0 and ends at (length -1). Its indexing has nothing to do with offset.

Field Summary

protected byte[]	buf
protected int	length
protected long	offset

Constructor Summary

Buffer(byte[] buf, int length)

Buffer(byte[] buf, int length, long offset)

Method Summary

byte[]	getBuffer()
int	getLength()
long	getOffset() Returns offset of the data the buffer was read from.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

buf

protected byte[] buf

length

protected int length

offset

protected long offset

Constructor Detail

Buffer

public Buffer(byte[] buf,
              int length)

Parameters:

buf - the data buffer (always starts at 0)

length - length of the data in the buffer

Buffer

public Buffer(byte[] buf,
              int length,
              long offset)

Parameters:

buf - the data buffer (always starts at 0)

length - length of the data in the buffer

offset - offset of the data the buffer was read from.

Method Detail

getBuffer

public byte[] getBuffer()

getLength

public int getLength()

getOffset

public long getOffset()

Returns offset of the data the buffer was read from. Value -1 indicates that offset is not supported. For instance, this will happen if the buffer represents a chunk of data read off the data channel in the stream mode.